Senior Network & Systems Engineer | Hybrid Cloud & Security

Strategic Analysis, Inc.; Arlington (VA); On-site; USD 110,000 - 160,000; Full time

Job summary

Strategic Analysis, Inc. is seeking an experienced Network Engineer and Information Systems Supervisor to support, maintain, and enhance our on-premise and cloud IT infrastructure.

The role ensures high availability, security, compliance, and performance across enterprise systems by managing physical network systems and Microsoft 365 services in hybrid environments. The ideal candidate is hands-on, troubleshoots complex issues, strengthens security, and maintains connectivity across on-prem and

Qualifications

• 3–7+ years of experience in network or systems administration.
• Strong networking fundamentals: TCP/IP, DNS, DHCP, VLANs, routing, switching, and VPNs.
• Hands-on experience with enterprise network hardware (Fortinet, Dell EMC, Sophos, etc.).
• Windows Server administration and Active Directory proficiency.
• Experience with Microsoft 365 administration and hybrid identity.
• Familiarity with Azure AD/Entra ID, Conditional Access, MFA, and Azure AD Connect.
• Experience with virtualization platforms (VMware ESXi).
• Familiarity with network monitoring tools (PRTG, SolarWinds).
• Strong network and cloud security best practices.
• Ability to troubleshoot across hybrid environments.
• Strong documentation and communication skills.
• Active government Secret or higher clearance, or ability to obtain and maintain the clearance.

Responsibilities

• Administer, monitor, and maintain on-premise network infrastructure including switches, routers, firewalls, wireless systems, and VPN solutions.
• Configure and manage LAN/WAN environments, VLANs, routing protocols, and network segmentation.
• Manage Windows Server environments, including Active Directory, DNS, DHCP, and Group Policy.
• Support virtualization platforms such as VMware ESXi and Hyper_V, including VM provisioning and performance optimization.
• Administer Microsoft 365 services (Exchange Online, Teams, SharePoint, OneDrive) and maintain hybrid configurations.
• Manage Azure AD/Entra ID identity services, including MFA, Conditional Access, SSO, and Azure AD Connect.
• Configure and maintain Intune/Endpoint Manager for device compliance, configuration profiles, and Autopilot deployments.
• Implement and maintain network and cloud security policies, including firewall rules, DLP, Defender for Office 365, and Zero Trust principles.
• Monitor network and system performance using tools such as, PRTG, or; respond to alerts and outages.
• Perform root_cause analysis and resolve escalated technical issues across both cloud and on_prem environments.
• Support disaster recovery planning, backups, and failover testing.
• Maintain accurate documentation including network diagrams, configuration records, and SOPs.
• Participate in infrastructure upgrades, cloud migrations, and modernization initiatives.
• Collaborate with IT team members to support end users and elevate issues when necessary.

Skills

Networking fundamentals

Fortinet switches

Fortigate firewall

Dell EMC hardware

Sophos firewall

Windows Server admin

Active Directory

Microsoft 365 admin

Azure AD/Entra ID

VMware ESXi

PRTG monitoring

SolarWinds

Zero Trust

Disaster recovery

Documentation

Tools

Hyper-V

Intune

Azure AD Connect

Group Policy

Druva

Veeam

Job description

Strategic Analysis, Inc. is seeking an experienced Network Engineer and Information Systems Supervisor to support, maintain, and enhance our on-premise and cloud IT infrastructure.

The role ensures high availability, security, compliance, and performance across enterprise systems by managing physical network systems and Microsoft 365 services in hybrid environments. The ideal candidate is hands-on, troubleshoots complex issues, strengthens security, and maintains connectivity across on-prem and